21000921880

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{311}}^1\times {\mathrm{2531}}^1$

素因数の和:2905

約数の個数: 128

約数和(自身を含む): 51190963200

約数和(自身を除く): 30190041320

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 29, 40, 46, 58, 92, 115, 116, 145, 184, 230, 232, 290, 311, 460, 580, 622, 667, 920, 1160, 1244, 1334, 1555, 2488, 2531, 2668, 3110, 3335, 5062, 5336, 6220, 6670, 7153, 9019, 10124, 12440, 12655, 13340, 14306, 18038, 20248, 25310, 26680, 28612, 35765, 36076, 45095, 50620, 57224, 58213, 71530, 72152, 73399, 90190, 101240, 116426, 143060, 146798, 180380, 207437, 232852, 286120, 291065, 293596, 360760, 366995, 414874, 465704, 582130, 587192, 733990, 787141, 829748, 1037185, 1164260, 1467980, 1574282, 1659496, 1688177, 2074370, 2328520, 2935960, 3148564, 3376354, 3935705, 4148740, 6297128, 6752708, 7871410, 8297480, 8440885, 13505416, 15742820, 16881770, 18104243, 22827089, 31485640, 33763540, 36208486, 45654178, 67527080, 72416972, 90521215, 91308356, 114135445, 144833944, 181042430, 182616712, 228270890, 362084860, 456541780, 525023047, 724169720, 913083560, 1050046094, 2100092188, 2625115235, 4200184376, 5250230470, 10500460940, 21000921880]

約数ペア:

[(1, 21000921880), (2, 10500460940), (4, 5250230470), (5, 4200184376), (8, 2625115235), (10, 2100092188), (20, 1050046094), (23, 913083560), (29, 724169720), (40, 525023047), (46, 456541780), (58, 362084860), (92, 228270890), (115, 182616712), (116, 181042430), (145, 144833944), (184, 114135445), (230, 91308356), (232, 90521215), (290, 72416972), (311, 67527080), (460, 45654178), (580, 36208486), (622, 33763540), (667, 31485640), (920, 22827089), (1160, 18104243), (1244, 16881770), (1334, 15742820), (1555, 13505416), (2488, 8440885), (2531, 8297480), (2668, 7871410), (3110, 6752708), (3335, 6297128), (5062, 4148740), (5336, 3935705), (6220, 3376354), (6670, 3148564), (7153, 2935960), (9019, 2328520), (10124, 2074370), (12440, 1688177), (12655, 1659496), (13340, 1574282), (14306, 1467980), (18038, 1164260), (20248, 1037185), (25310, 829748), (26680, 787141), (28612, 733990), (35765, 587192), (36076, 582130), (45095, 465704), (50620, 414874), (57224, 366995), (58213, 360760), (71530, 293596), (72152, 291065), (73399, 286120), (90190, 232852), (101240, 207437), (116426, 180380), (143060, 146798)]