21278220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{907}}^1$

素因数の和:959

約数の個数: 96

約数和(自身を含む): 65899008

約数和(自身を除く): 44620788

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 23, 30, 34, 46, 51, 60, 68, 69, 85, 92, 102, 115, 138, 170, 204, 230, 255, 276, 340, 345, 391, 460, 510, 690, 782, 907, 1020, 1173, 1380, 1564, 1814, 1955, 2346, 2721, 3628, 3910, 4535, 4692, 5442, 5865, 7820, 9070, 10884, 11730, 13605, 15419, 18140, 20861, 23460, 27210, 30838, 41722, 46257, 54420, 61676, 62583, 77095, 83444, 92514, 104305, 125166, 154190, 185028, 208610, 231285, 250332, 308380, 312915, 354637, 417220, 462570, 625830, 709274, 925140, 1063911, 1251660, 1418548, 1773185, 2127822, 3546370, 4255644, 5319555, 7092740, 10639110, 21278220]

約数ペア:

[(1, 21278220), (2, 10639110), (3, 7092740), (4, 5319555), (5, 4255644), (6, 3546370), (10, 2127822), (12, 1773185), (15, 1418548), (17, 1251660), (20, 1063911), (23, 925140), (30, 709274), (34, 625830), (46, 462570), (51, 417220), (60, 354637), (68, 312915), (69, 308380), (85, 250332), (92, 231285), (102, 208610), (115, 185028), (138, 154190), (170, 125166), (204, 104305), (230, 92514), (255, 83444), (276, 77095), (340, 62583), (345, 61676), (391, 54420), (460, 46257), (510, 41722), (690, 30838), (782, 27210), (907, 23460), (1020, 20861), (1173, 18140), (1380, 15419), (1564, 13605), (1814, 11730), (1955, 10884), (2346, 9070), (2721, 7820), (3628, 5865), (3910, 5442), (4535, 4692)]