20853420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{173}}^1$

素因数の和:240

約数の個数: 144

約数和(自身を含む): 69981408

約数和(自身を除く): 49127988

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 41, 42, 49, 60, 70, 82, 84, 98, 105, 123, 140, 147, 164, 173, 196, 205, 210, 245, 246, 287, 294, 346, 410, 420, 490, 492, 519, 574, 588, 615, 692, 735, 820, 861, 865, 980, 1038, 1148, 1211, 1230, 1435, 1470, 1722, 1730, 2009, 2076, 2422, 2460, 2595, 2870, 2940, 3444, 3460, 3633, 4018, 4305, 4844, 5190, 5740, 6027, 6055, 7093, 7266, 8036, 8477, 8610, 10045, 10380, 12054, 12110, 14186, 14532, 16954, 17220, 18165, 20090, 21279, 24108, 24220, 25431, 28372, 30135, 33908, 35465, 36330, 40180, 42385, 42558, 49651, 50862, 60270, 70930, 72660, 84770, 85116, 99302, 101724, 106395, 120540, 127155, 141860, 148953, 169540, 198604, 212790, 248255, 254310, 297906, 347557, 425580, 496510, 508620, 595812, 695114, 744765, 993020, 1042671, 1390228, 1489530, 1737785, 2085342, 2979060, 3475570, 4170684, 5213355, 6951140, 10426710, 20853420]

約数ペア:

[(1, 20853420), (2, 10426710), (3, 6951140), (4, 5213355), (5, 4170684), (6, 3475570), (7, 2979060), (10, 2085342), (12, 1737785), (14, 1489530), (15, 1390228), (20, 1042671), (21, 993020), (28, 744765), (30, 695114), (35, 595812), (41, 508620), (42, 496510), (49, 425580), (60, 347557), (70, 297906), (82, 254310), (84, 248255), (98, 212790), (105, 198604), (123, 169540), (140, 148953), (147, 141860), (164, 127155), (173, 120540), (196, 106395), (205, 101724), (210, 99302), (245, 85116), (246, 84770), (287, 72660), (294, 70930), (346, 60270), (410, 50862), (420, 49651), (490, 42558), (492, 42385), (519, 40180), (574, 36330), (588, 35465), (615, 33908), (692, 30135), (735, 28372), (820, 25431), (861, 24220), (865, 24108), (980, 21279), (1038, 20090), (1148, 18165), (1211, 17220), (1230, 16954), (1435, 14532), (1470, 14186), (1722, 12110), (1730, 12054), (2009, 10380), (2076, 10045), (2422, 8610), (2460, 8477), (2595, 8036), (2870, 7266), (2940, 7093), (3444, 6055), (3460, 6027), (3633, 5740), (4018, 5190), (4305, 4844)]