20866720

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{601}}^1$

素因数の和:654

約数の個数: 96

約数和(自身を含む): 58254336

約数和(自身を除く): 37387616

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 160, 217, 224, 248, 280, 310, 434, 496, 560, 601, 620, 868, 992, 1085, 1120, 1202, 1240, 1736, 2170, 2404, 2480, 3005, 3472, 4207, 4340, 4808, 4960, 6010, 6944, 8414, 8680, 9616, 12020, 16828, 17360, 18631, 19232, 21035, 24040, 33656, 34720, 37262, 42070, 48080, 67312, 74524, 84140, 93155, 96160, 130417, 134624, 149048, 168280, 186310, 260834, 298096, 336560, 372620, 521668, 596192, 652085, 673120, 745240, 1043336, 1304170, 1490480, 2086672, 2608340, 2980960, 4173344, 5216680, 10433360, 20866720]

約数ペア:

[(1, 20866720), (2, 10433360), (4, 5216680), (5, 4173344), (7, 2980960), (8, 2608340), (10, 2086672), (14, 1490480), (16, 1304170), (20, 1043336), (28, 745240), (31, 673120), (32, 652085), (35, 596192), (40, 521668), (56, 372620), (62, 336560), (70, 298096), (80, 260834), (112, 186310), (124, 168280), (140, 149048), (155, 134624), (160, 130417), (217, 96160), (224, 93155), (248, 84140), (280, 74524), (310, 67312), (434, 48080), (496, 42070), (560, 37262), (601, 34720), (620, 33656), (868, 24040), (992, 21035), (1085, 19232), (1120, 18631), (1202, 17360), (1240, 16828), (1736, 12020), (2170, 9616), (2404, 8680), (2480, 8414), (3005, 6944), (3472, 6010), (4207, 4960), (4340, 4808)]