21036990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{167}}^1$

素因数の和:226

約数の個数: 128

約数和(自身を含む): 60963840

約数和(自身を除く): 39926850

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 17, 19, 26, 30, 34, 38, 39, 51, 57, 65, 78, 85, 95, 102, 114, 130, 167, 170, 190, 195, 221, 247, 255, 285, 323, 334, 390, 442, 494, 501, 510, 570, 646, 663, 741, 835, 969, 1002, 1105, 1235, 1326, 1482, 1615, 1670, 1938, 2171, 2210, 2470, 2505, 2839, 3173, 3230, 3315, 3705, 4199, 4342, 4845, 5010, 5678, 6346, 6513, 6630, 7410, 8398, 8517, 9519, 9690, 10855, 12597, 13026, 14195, 15865, 17034, 19038, 20995, 21710, 25194, 28390, 31730, 32565, 36907, 41249, 41990, 42585, 47595, 53941, 62985, 65130, 73814, 82498, 85170, 95190, 107882, 110721, 123747, 125970, 161823, 184535, 206245, 221442, 247494, 269705, 323646, 369070, 412490, 539410, 553605, 618735, 701233, 809115, 1107210, 1237470, 1402466, 1618230, 2103699, 3506165, 4207398, 7012330, 10518495, 21036990]

約数ペア:

[(1, 21036990), (2, 10518495), (3, 7012330), (5, 4207398), (6, 3506165), (10, 2103699), (13, 1618230), (15, 1402466), (17, 1237470), (19, 1107210), (26, 809115), (30, 701233), (34, 618735), (38, 553605), (39, 539410), (51, 412490), (57, 369070), (65, 323646), (78, 269705), (85, 247494), (95, 221442), (102, 206245), (114, 184535), (130, 161823), (167, 125970), (170, 123747), (190, 110721), (195, 107882), (221, 95190), (247, 85170), (255, 82498), (285, 73814), (323, 65130), (334, 62985), (390, 53941), (442, 47595), (494, 42585), (501, 41990), (510, 41249), (570, 36907), (646, 32565), (663, 31730), (741, 28390), (835, 25194), (969, 21710), (1002, 20995), (1105, 19038), (1235, 17034), (1326, 15865), (1482, 14195), (1615, 13026), (1670, 12597), (1938, 10855), (2171, 9690), (2210, 9519), (2470, 8517), (2505, 8398), (2839, 7410), (3173, 6630), (3230, 6513), (3315, 6346), (3705, 5678), (4199, 5010), (4342, 4845)]