21731940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{769}}^1$

素因数の和:941

約数の個数: 72

約数和(自身を含む): 66426360

約数和(自身を除く): 44694420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 157, 180, 314, 471, 628, 769, 785, 942, 1413, 1538, 1570, 1884, 2307, 2355, 2826, 3076, 3140, 3845, 4614, 4710, 5652, 6921, 7065, 7690, 9228, 9420, 11535, 13842, 14130, 15380, 23070, 27684, 28260, 34605, 46140, 69210, 120733, 138420, 241466, 362199, 482932, 603665, 724398, 1086597, 1207330, 1448796, 1810995, 2173194, 2414660, 3621990, 4346388, 5432985, 7243980, 10865970, 21731940]

約数ペア:

[(1, 21731940), (2, 10865970), (3, 7243980), (4, 5432985), (5, 4346388), (6, 3621990), (9, 2414660), (10, 2173194), (12, 1810995), (15, 1448796), (18, 1207330), (20, 1086597), (30, 724398), (36, 603665), (45, 482932), (60, 362199), (90, 241466), (157, 138420), (180, 120733), (314, 69210), (471, 46140), (628, 34605), (769, 28260), (785, 27684), (942, 23070), (1413, 15380), (1538, 14130), (1570, 13842), (1884, 11535), (2307, 9420), (2355, 9228), (2826, 7690), (3076, 7065), (3140, 6921), (3845, 5652), (4614, 4710)]