31221540

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{349}}^1$

素因数の和:442

約数の個数: 144

約数和(自身を含む): 110073600

約数和(自身を除く): 78852060

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 71, 84, 90, 105, 126, 140, 142, 180, 210, 213, 252, 284, 315, 349, 355, 420, 426, 497, 630, 639, 698, 710, 852, 994, 1047, 1065, 1260, 1278, 1396, 1420, 1491, 1745, 1988, 2094, 2130, 2443, 2485, 2556, 2982, 3141, 3195, 3490, 4188, 4260, 4473, 4886, 4970, 5235, 5964, 6282, 6390, 6980, 7329, 7455, 8946, 9772, 9940, 10470, 12215, 12564, 12780, 14658, 14910, 15705, 17892, 20940, 21987, 22365, 24430, 24779, 29316, 29820, 31410, 36645, 43974, 44730, 48860, 49558, 62820, 73290, 74337, 87948, 89460, 99116, 109935, 123895, 146580, 148674, 173453, 219870, 223011, 247790, 297348, 346906, 371685, 439740, 446022, 495580, 520359, 693812, 743370, 867265, 892044, 1040718, 1115055, 1486740, 1561077, 1734530, 2081436, 2230110, 2601795, 3122154, 3469060, 4460220, 5203590, 6244308, 7805385, 10407180, 15610770, 31221540]

約数ペア:

[(1, 31221540), (2, 15610770), (3, 10407180), (4, 7805385), (5, 6244308), (6, 5203590), (7, 4460220), (9, 3469060), (10, 3122154), (12, 2601795), (14, 2230110), (15, 2081436), (18, 1734530), (20, 1561077), (21, 1486740), (28, 1115055), (30, 1040718), (35, 892044), (36, 867265), (42, 743370), (45, 693812), (60, 520359), (63, 495580), (70, 446022), (71, 439740), (84, 371685), (90, 346906), (105, 297348), (126, 247790), (140, 223011), (142, 219870), (180, 173453), (210, 148674), (213, 146580), (252, 123895), (284, 109935), (315, 99116), (349, 89460), (355, 87948), (420, 74337), (426, 73290), (497, 62820), (630, 49558), (639, 48860), (698, 44730), (710, 43974), (852, 36645), (994, 31410), (1047, 29820), (1065, 29316), (1260, 24779), (1278, 24430), (1396, 22365), (1420, 21987), (1491, 20940), (1745, 17892), (1988, 15705), (2094, 14910), (2130, 14658), (2443, 12780), (2485, 12564), (2556, 12215), (2982, 10470), (3141, 9940), (3195, 9772), (3490, 8946), (4188, 7455), (4260, 7329), (4473, 6980), (4886, 6390), (4970, 6282), (5235, 5964)]