20211580220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{521}}^1\times {\mathrm{7853}}^1$

素因数の和:8415

約数の個数: 96

約数和(自身を含む): 48213506880

約数和(自身を除く): 28001926660

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 521, 988, 1042, 1235, 2084, 2470, 2605, 4940, 5210, 6773, 7853, 9899, 10420, 13546, 15706, 19798, 27092, 31412, 33865, 39265, 39596, 49495, 67730, 78530, 98990, 102089, 128687, 135460, 149207, 157060, 197980, 204178, 257374, 298414, 408356, 510445, 514748, 596828, 643435, 746035, 1020890, 1286870, 1492070, 1939691, 2041780, 2573740, 2984140, 3879382, 4091413, 7758764, 8182826, 9698455, 16365652, 19396910, 20457065, 38793820, 40914130, 53188369, 77736847, 81828260, 106376738, 155473694, 212753476, 265941845, 310947388, 388684235, 531883690, 777368470, 1010579011, 1063767380, 1554736940, 2021158022, 4042316044, 5052895055, 10105790110, 20211580220]

約数ペア:

[(1, 20211580220), (2, 10105790110), (4, 5052895055), (5, 4042316044), (10, 2021158022), (13, 1554736940), (19, 1063767380), (20, 1010579011), (26, 777368470), (38, 531883690), (52, 388684235), (65, 310947388), (76, 265941845), (95, 212753476), (130, 155473694), (190, 106376738), (247, 81828260), (260, 77736847), (380, 53188369), (494, 40914130), (521, 38793820), (988, 20457065), (1042, 19396910), (1235, 16365652), (2084, 9698455), (2470, 8182826), (2605, 7758764), (4940, 4091413), (5210, 3879382), (6773, 2984140), (7853, 2573740), (9899, 2041780), (10420, 1939691), (13546, 1492070), (15706, 1286870), (19798, 1020890), (27092, 746035), (31412, 643435), (33865, 596828), (39265, 514748), (39596, 510445), (49495, 408356), (67730, 298414), (78530, 257374), (98990, 204178), (102089, 197980), (128687, 157060), (135460, 149207)]