21215220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{461}}^1$

素因数の和:545

約数の個数: 96

約数和(自身を含む): 65197440

約数和(自身を除く): 43982220

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 59, 60, 65, 78, 118, 130, 156, 177, 195, 236, 260, 295, 354, 390, 461, 590, 708, 767, 780, 885, 922, 1180, 1383, 1534, 1770, 1844, 2301, 2305, 2766, 3068, 3540, 3835, 4602, 4610, 5532, 5993, 6915, 7670, 9204, 9220, 11505, 11986, 13830, 15340, 17979, 23010, 23972, 27199, 27660, 29965, 35958, 46020, 54398, 59930, 71916, 81597, 89895, 108796, 119860, 135995, 163194, 179790, 271990, 326388, 353587, 359580, 407985, 543980, 707174, 815970, 1060761, 1414348, 1631940, 1767935, 2121522, 3535870, 4243044, 5303805, 7071740, 10607610, 21215220]

約数ペア:

[(1, 21215220), (2, 10607610), (3, 7071740), (4, 5303805), (5, 4243044), (6, 3535870), (10, 2121522), (12, 1767935), (13, 1631940), (15, 1414348), (20, 1060761), (26, 815970), (30, 707174), (39, 543980), (52, 407985), (59, 359580), (60, 353587), (65, 326388), (78, 271990), (118, 179790), (130, 163194), (156, 135995), (177, 119860), (195, 108796), (236, 89895), (260, 81597), (295, 71916), (354, 59930), (390, 54398), (461, 46020), (590, 35958), (708, 29965), (767, 27660), (780, 27199), (885, 23972), (922, 23010), (1180, 17979), (1383, 15340), (1534, 13830), (1770, 11986), (1844, 11505), (2301, 9220), (2305, 9204), (2766, 7670), (3068, 6915), (3540, 5993), (3835, 5532), (4602, 4610)]