21959820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6421}}^1$

素因数の和:6455

約数の個数: 72

約数和(自身を含む): 70128240

約数和(自身を除く): 48168420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 60, 76, 90, 95, 114, 171, 180, 190, 228, 285, 342, 380, 570, 684, 855, 1140, 1710, 3420, 6421, 12842, 19263, 25684, 32105, 38526, 57789, 64210, 77052, 96315, 115578, 121999, 128420, 192630, 231156, 243998, 288945, 365997, 385260, 487996, 577890, 609995, 731994, 1097991, 1155780, 1219990, 1463988, 1829985, 2195982, 2439980, 3659970, 4391964, 5489955, 7319940, 10979910, 21959820]

約数ペア:

[(1, 21959820), (2, 10979910), (3, 7319940), (4, 5489955), (5, 4391964), (6, 3659970), (9, 2439980), (10, 2195982), (12, 1829985), (15, 1463988), (18, 1219990), (19, 1155780), (20, 1097991), (30, 731994), (36, 609995), (38, 577890), (45, 487996), (57, 385260), (60, 365997), (76, 288945), (90, 243998), (95, 231156), (114, 192630), (171, 128420), (180, 121999), (190, 115578), (228, 96315), (285, 77052), (342, 64210), (380, 57789), (570, 38526), (684, 32105), (855, 25684), (1140, 19263), (1710, 12842), (3420, 6421)]