20511540

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{223}}^1$

素因数の和:318

約数の個数: 144

約数和(自身を含む): 72403968

約数和(自身を除く): 51892428

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, 73, 84, 90, 105, 126, 140, 146, 180, 210, 219, 223, 252, 292, 315, 365, 420, 438, 446, 511, 630, 657, 669, 730, 876, 892, 1022, 1095, 1115, 1260, 1314, 1338, 1460, 1533, 1561, 2007, 2044, 2190, 2230, 2555, 2628, 2676, 3066, 3122, 3285, 3345, 4014, 4380, 4460, 4599, 4683, 5110, 6132, 6244, 6570, 6690, 7665, 7805, 8028, 9198, 9366, 10035, 10220, 13140, 13380, 14049, 15330, 15610, 16279, 18396, 18732, 20070, 22995, 23415, 28098, 30660, 31220, 32558, 40140, 45990, 46830, 48837, 56196, 65116, 70245, 81395, 91980, 93660, 97674, 113953, 140490, 146511, 162790, 195348, 227906, 244185, 280980, 293022, 325580, 341859, 455812, 488370, 569765, 586044, 683718, 732555, 976740, 1025577, 1139530, 1367436, 1465110, 1709295, 2051154, 2279060, 2930220, 3418590, 4102308, 5127885, 6837180, 10255770, 20511540]

約数ペア:

[(1, 20511540), (2, 10255770), (3, 6837180), (4, 5127885), (5, 4102308), (6, 3418590), (7, 2930220), (9, 2279060), (10, 2051154), (12, 1709295), (14, 1465110), (15, 1367436), (18, 1139530), (20, 1025577), (21, 976740), (28, 732555), (30, 683718), (35, 586044), (36, 569765), (42, 488370), (45, 455812), (60, 341859), (63, 325580), (70, 293022), (73, 280980), (84, 244185), (90, 227906), (105, 195348), (126, 162790), (140, 146511), (146, 140490), (180, 113953), (210, 97674), (219, 93660), (223, 91980), (252, 81395), (292, 70245), (315, 65116), (365, 56196), (420, 48837), (438, 46830), (446, 45990), (511, 40140), (630, 32558), (657, 31220), (669, 30660), (730, 28098), (876, 23415), (892, 22995), (1022, 20070), (1095, 18732), (1115, 18396), (1260, 16279), (1314, 15610), (1338, 15330), (1460, 14049), (1533, 13380), (1561, 13140), (2007, 10220), (2044, 10035), (2190, 9366), (2230, 9198), (2555, 8028), (2628, 7805), (2676, 7665), (3066, 6690), (3122, 6570), (3285, 6244), (3345, 6132), (4014, 5110), (4380, 4683), (4460, 4599)]