21216780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9067}}^1$

素因数の和:9095

約数の個数: 72

約数和(自身を含む): 69315792

約数和(自身を除く): 48099012

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 180, 195, 234, 260, 390, 468, 585, 780, 1170, 2340, 9067, 18134, 27201, 36268, 45335, 54402, 81603, 90670, 108804, 117871, 136005, 163206, 181340, 235742, 272010, 326412, 353613, 408015, 471484, 544020, 589355, 707226, 816030, 1060839, 1178710, 1414452, 1632060, 1768065, 2121678, 2357420, 3536130, 4243356, 5304195, 7072260, 10608390, 21216780]

約数ペア:

[(1, 21216780), (2, 10608390), (3, 7072260), (4, 5304195), (5, 4243356), (6, 3536130), (9, 2357420), (10, 2121678), (12, 1768065), (13, 1632060), (15, 1414452), (18, 1178710), (20, 1060839), (26, 816030), (30, 707226), (36, 589355), (39, 544020), (45, 471484), (52, 408015), (60, 353613), (65, 326412), (78, 272010), (90, 235742), (117, 181340), (130, 163206), (156, 136005), (180, 117871), (195, 108804), (234, 90670), (260, 81603), (390, 54402), (468, 45335), (585, 36268), (780, 27201), (1170, 18134), (2340, 9067)]