20213830

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{229}}^1$

素因数の和:353

約数の個数: 64

約数和(自身を含む): 45440640

約数和(自身を除く): 25226810

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 97, 130, 182, 194, 229, 455, 458, 485, 679, 910, 970, 1145, 1261, 1358, 1603, 2290, 2522, 2977, 3206, 3395, 5954, 6305, 6790, 8015, 8827, 12610, 14885, 16030, 17654, 20839, 22213, 29770, 41678, 44135, 44426, 88270, 104195, 111065, 155491, 208390, 222130, 288769, 310982, 577538, 777455, 1443845, 1554910, 2021383, 2887690, 4042766, 10106915, 20213830]

約数ペア:

[(1, 20213830), (2, 10106915), (5, 4042766), (7, 2887690), (10, 2021383), (13, 1554910), (14, 1443845), (26, 777455), (35, 577538), (65, 310982), (70, 288769), (91, 222130), (97, 208390), (130, 155491), (182, 111065), (194, 104195), (229, 88270), (455, 44426), (458, 44135), (485, 41678), (679, 29770), (910, 22213), (970, 20839), (1145, 17654), (1261, 16030), (1358, 14885), (1603, 12610), (2290, 8827), (2522, 8015), (2977, 6790), (3206, 6305), (3395, 5954)]