20790721315

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{283813}}^1$

素因数の和:283868

約数の個数: 48

約数和(自身を含む): 32613634368

約数和(自身を除く): 11822913053

約数列:

[1, 5, 7, 13, 23, 35, 49, 65, 91, 115, 161, 245, 299, 455, 637, 805, 1127, 1495, 2093, 3185, 5635, 10465, 14651, 73255, 283813, 1419065, 1986691, 3689569, 6527699, 9933455, 13906837, 18447845, 25826983, 32638495, 45693893, 69534185, 84860087, 129134915, 180788881, 228469465, 319857251, 424300435, 594020609, 903944405, 1599286255, 2970103045, 4158144263, 20790721315]

約数ペア:

[(1, 20790721315), (5, 4158144263), (7, 2970103045), (13, 1599286255), (23, 903944405), (35, 594020609), (49, 424300435), (65, 319857251), (91, 228469465), (115, 180788881), (161, 129134915), (245, 84860087), (299, 69534185), (455, 45693893), (637, 32638495), (805, 25826983), (1127, 18447845), (1495, 13906837), (2093, 9933455), (3185, 6527699), (5635, 3689569), (10465, 1986691), (14651, 1419065), (73255, 283813)]